Dust cap



Dec. 15, 1925.

1,565,667 E. NELSON n Al.

DUST CAP Filed Oct. 51. 1924 Eltrozmq ramas Dee. is, 192s.

, Unirse sra'iasv PATENT oFFIcE.-

illumini. irnLsoN nin ADoLrHUe maison Bassum, or caminata, caauomru. l

i nus'r car.

Application led October 31, 19M. Serial No. 747,039.-

4To all whom it may concern Be it known that we, EMANUEL NELsoN and AnoLPHUs ADDISON BAssE'i'r, citizens of course of the following escrption.

the United States, residing at Glendale, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in a Dust Cap, of which the following is a specification.,

This invention relates to improvements in dust caps for the valve stems of pneumatic tires and has for its'principal object to provide a simple and eficient'means whereby the cap may be readily moved `out of engagement with the up er end of the usual valve stem to permit t e attachment of an inflatingump to the valve without necessitating t-e 4entire removal ofthe dust cap t from the valve stem.

'A further object of= the inventionis to provide a dust ca of the above mentioned character, wherein means is associated therewith for preventing any' foreign substance from coming in contact with lthe up r end of the valve stem when the cap is in its normal position on the stem.

A still further object of the invention is to provide a dust cap of the abovementioned character, which is of such construction'as tol prevent the accidental di lacement of the dust cap such as frequent occurs when the dust cap. is removed an -the* pneumatic tires of an automobile are being infiated.

A still further vobject of the invention is to provide a dust cap of thefabove mentioned character, which is simple. in con struction, inexpensive, strong and durable and furthermore adapted for the purposes A:for which it is desi ated.

Other ob'ects an advantages of this invention will become ap arent during the In the accompanying drawing forming a part of this ification and in which like numerals designate` like parte throughout `the same:

Figure 1 is a `side elevation of the `dust 4 cap embodying myinvention showing the an les thereto,a.nd

y'same in position on a valve stem.

Figure 2 is a similar view taken at right igure 3 is a vertical sectional view thereof. l

f In'the drawing wherein for the purpose of illustration is shown the bodmei'it of my invention, the numerical 1 posed over the upper end of the valve stem Aand normall held in engagement therewith by means'v o lthe coil sprin 16, one end ofdesignates a supporting sleeve, the lower end thereof being internally threaded as illustrated at 2 for engagement with the usual yalve stem 3.' The lower end of the sleeve 1 is adapted to engage the usual locking nut 4. threa ed on the valve stem 3. Extending laterally from the upper portion ofthe sleeve` 1 st diametrically opposite oints are the 4pins 5 vand 6 respectively. he uppr ypair of di'ametrically opposed ears 9 and 10 respectively. The ears 9 and 10 of the cap 7 fit over the sleeve 1 and formed in each of Ithe ears is a longitudinally extending slot 11 which terminates at its u per end in the lateral slot 12, the end of which terminates in the downwardly extending notch 13. The provision of the bayonet slots in the ears of the lower portion of the ca 7 provides a means for cooperation with t e laterally extending pins 5 and 6 whereby the cap 7 is adapted for slidable as well as pivotal lwinging movement with respect to .the

eeve.

usy

When the cap 7 is in'its normal position 4' on the sleeve 1 in the manner shown in the drawing, the ins 5 and 6 on the upper portion of the s eeve 1 will be seated` in the notches 13 formed in the tive ears of the cap whereby the .cap is normally locked inV a closed position 'over the upper end of the valve stem. 'To further prevent -any forei substance from gaining access to the va ve in the vupper portion of the valve stem, a rubber cover 14 which. is su in the metallic receptacle 15 is diswhich engages the top of t e cap 7 andthe other endbein in engagement with the metallic rece tac e 15 inthe manner clearly shown in igurey 3. The rubber cover 14: has its central portion provided with a de- -pression to prevent the air within the pneumatic inner tube from being released when the cap 7 is in position over the upper end of the valve stem.

`When it becomes. necessary to inflate the inner tube cfa pneumatic tire by attaching ios- ^ eral slots12 so that the pins within the upper portion of the longitudinallyI extending slots 11. By releasing theV on the upper end of the cap 7 u an inating pump end of the valve stem, the

from its normal position by actuating the cap in such a manner as vto cause the pins to be moved out of engagement with the notches 13 and the latwill be disposed cap 7 is disengaged pressure the coil spring 16 which is normally compressed will assist in causing the cap 7 to move upwardly with respectv to the sleeve end when the pins and 6 are in the lowerniost ends of the slots 11the cap 7 may then be swung into the position as shown in the dotted lines in Figure l whereby the seme will uncover the ,upper end of the valve stem yand permit the attachment of an inlating pum thereto. This construction permits the ust cap 7 to be swung out et the' way yet supportedby the sleeve lin the accidental such a :manner` es to prevent I U the mation displacement of the cap during of the inner tube of a pneumatic tire. After,

the inner tube has been properly inated, the dust cap 7 is again moved to its normal position over the upper end ofA the valve m. c fit will thus be seen from the foregoing description,

in disengaging the dust cap from the valve stein whenever it becomes necessary, means being Jfurther provided for normally locking the dust cap in position over the valve stem against accidental displacement theretrom. Whilewe have shown the preferred embodiment of our invention, it is to be understood that various changes in the size, shape that a dust cap for valve stems has been provided which is of such construction as to save considerable time and labor y and arrangement of parts may be resorted 'to wit-hout departing from the spirit of the auvent-ion and the scopev of the appended claims.

Having thus described the invention, what we claim is i 1. A dust cap comprising a sleeve threaded at its lower end onthe usual valve stem, laterally extending pins .at diametrically opposite points on the upper portion of the sleeve, a cap member, 'ears on-the lower portion of the cap at diametrically opposite l i points, said earsbeing provided with bayonet slots for cooperation with the aforementioned pins onsaid sleeve to permit the cap to normall cover the upper end of the valve stem, and rther'permit the-outward swingving movementof the cap with j respect to cap to normally cover the upper end of the' valve stem, and further' ermit the outward swinging movement. of t e cap with respect to the s eeve for uncovering the upper end of the valve stem for inflating purposes, and means invsaid cap for engagement with the upper end of. the valve stem when the cap is in its normal position.

ln testimony whereof we adix our signatures. i

' l EMANUEL NELSON.

f ADOLPHUS ADDISON BASSETT. 

